/* github的猫 */
.github-corner:hover .octo-arm {
    animation: octocat-wave 560ms ease-in-out
  }

  @keyframes octocat-wave {

    0%,
    100% {
      transform: rotate(0)
    }

    20%,
    60% {
      transform: rotate(-25deg)
    }

    40%,
    80% {
      transform: rotate(10deg)
    }
  }

  @media (max-width:500px) {
    .github-corner:hover .octo-arm {
      animation: none
    }

    .github-corner .octo-arm {
      animation: octocat-wave 560ms ease-in-out
    }
  }